Yanmar 3TNV82A User manual

TNV DI Service Manual
TNV series
SERVICE MANUAL
3TNV82A
3TNV84 • 3TNV84T • 3TNV88
4TNV84 • 4TNV84T • 4TNV88
4TNV94L
4TNV98 • 4TNV98T
4TNV106 • 4TNV106T
P/N: 0BTNV0-U0000
INDUSTRIAL
ENGINES

ii TNV DI Service Manual
This Service Manual has been developed for the exclusive use of service and repair professionals such as
Yanmer authorized Distributors and Yanmar authorized Dealers. It is written with these professionals in mind
and may not contain the necessary detail or safety statements that may be required for a non-professional to
perform the service or repair properly and / or safely. Please contact an authorized Yanmar repair or service
professional before working on your Yanmar product.
Disclaimers:
All information, illustrations and specifications in this manual are based on the latest information available at
the time of publishing. The illustrations used in this manual are intended as representative reference views
only. Moreover, because of our continuous product improvement policy, we may modify information,
illustrations, and / or specifications to explain and / or exemplify a product, service, or maintenance
improvement. We reserve the right to make any change at any time.
Yanmar and are registered trademarks of Yanmar Co., Ltd. in Japan, the United States and / or
other countries.
All Rights Reserved:
No part of this publication may be reproduced or used in any form by any means - graphic, electronic, or
mechanical, including photocopying, recording, taping, or information storage and retrieval systems - without
the written permission of Yanmar Co., Ltd.
© 2005 Yanmar Co. Ltd.

iii
Section 1
TABLE OF
CONTENTS
Page
Table of Contents................................................................................... iii
Introduction ......................................................................................... 1-1
Yanmar Warranties.............................................................................. 2-1
Safety.................................................................................................... 3-1
General Service Information .............................................................. 4-1
Engine .................................................................................................. 6-1
Periodic Maintenance ......................................................................... 5-1
Fuel System ......................................................................................... 7-1
Cooling System ................................................................................... 8-1
Lubrication System............................................................................. 9-1
Turbocharger..................................................................................... 10-1
Starter Motor...................................................................................... 11-1
Alternator ........................................................................................... 12-1
Electric Wiring ................................................................................... 13-1
Troubleshooting................................................................................ 14-1

TABLE OF CONTENTS
iv
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TNV DI Service Manual 1-1
TNV DI Service Manual Section 1
INTRODUCTION
This Service Manual describes the service
procedures for the TNV series direct injection
engines. These engines are certified by the U.S.
EPA, California ARB and/or the 97/68/EC Directive
for industrial use.
Please use this manual for accurate, quick and safe
servicing of the engine. Since the directions in this
manual are for a typical engine, some
specifications and components may be different
from your engine. Refer to the documentation
supplied by the optional equipment manufacturer
for specific service instructions.
Yanmar products are continuously undergoing
improvement. This Service Manual might not
address possible field modifications to the
equipment. Contact an authorized Yanmar
industrial engine dealer or distributor for answers to
any questions relating to field modifications.

INTRODUCTION
1-2 TNV DI Service Manual
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TNV DI Service Manual 2-1
TNV DI Service Manual Section 2
YANMAR
WARRANTIES
Page
Yanmar Limited Warranty................................................................ 2-3
What is Covered by this Warranty? .......................................... 2-3
How Long is the Warranty Period? ........................................... 2-3
What the Engine Owner Must Do: ............................................ 2-3
To Locate an Authorized Yanmar Industrial Engine Dealer
or Distributor:............................................................................. 2-4
What Yanmar Will Do: ............................................................... 2-4
What is Not Covered by this Warranty? ................................... 2-4
Warranty Limitations: ................................................................ 2-5
Warranty Modifications: ............................................................ 2-5
Questions: ................................................................................. 2-5
Retail Purchaser Registration.................................................... 2-5
Emission System Warranty ............................................................. 2-6
Yanmar Co., Ltd. Limited Emission Control System
Warranty - USA Only....................................................................... 2-6
Your Warranty Rights and Obligations: ..................................... 2-6
Manufacturer’s Warranty Period:............................................... 2-6
Warranty Coverage: .................................................................. 2-7
Warranted Parts: ....................................................................... 2-7
Exclusions: ................................................................................ 2-8
Owner’s Warranty Responsibilities:........................................... 2-8

YANMAR WARRANTIES
2-2 TNV DI Service Manual
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YANMAR WARRANTIES
TNV DI Service Manual 2-3
Yanmar Limited Warranty
YANMAR LIMITED WARRANTY
What is Covered by this Warranty?
Yanmar warrants to the original retail purchaser that a new Yanmar TNV Series Industrial Engine will be free
from defects in material and / or workmanship for the duration of the warranty period.
Note: Yanmar engines may be equipped with external components including, but not limited to: wiring
harnesses, electrical devices, control panels, radiators, air filters, fuel filters, and/or exhaust systems
that are supplied and/or installed by manufacturers other than Yanmar. For warranty information on
such external components, please contact the machine or component manufacturer directly or see
your authorized Yanmar dealer or distributor.
THIS WARRANTY IS PROVIDED IN LIEU OF ALL OTHER WARRANTIES, EXPRESS OR IMPLIED.
YANMAR SPECIFICALLY DISCLAIMS ANY IMPLIED WARRANTIES OF MERCHANTABILITY OR
FITNESS FOR A PARTICULAR PURPOSE, except where such disclaimer is prohibited by law. IF SUCH
DISCLAIMER IS PROHIBITED BY LAW, THEN IMPLIED WARRANTIES SHALL BE LIMITED IN
DURATION TO THE LIFE OF THE EXPRESS WARRANTY.
How Long is the Warranty Period?
The Yanmar standard limited warranty period runs for a period of twenty-four (24) months or two-
thousand (2000) engine operation hours, whichever occurs first. An extended limited warranty of thirty-six
(36) months or three thousand (3000) engine operating hours, whichever occurs first, is provided for these
specific parts only: the cylinder block, cylinder head, crankshaft forging, connecting rods, flywheel, flywheel
housing, camshaft, timing gear, and gear case. The Warranty Period for both the standard limited warranty
and the extended limited warranty (by duration or operation hours) begins on the date of delivery to the
original retail purchaser and is valid only until the applicable warranted duration has passed or the operation
hours are exceeded, whichever comes first.
What the Engine Owner Must Do:
If you believe your Yanmar engine has experienced a failure due to a defect in material and / or
workmanship, you must contact an authorized Yanmar industrial engine dealer or distributor within thirty (30)
days of discovering the failure. You must provide proof of ownership of the engine, proof of the date of the
engine purchase and delivery, and documentation of the engine operation hours. Acceptable forms of proof
of delivery date include, but are not limited to: the original warranty registration or sales receipts or other
documents maintained in the ordinary course of business by Yanmar dealers and / or distributors, indicating
the date of delivery of the Yanmar product to the original retail purchaser. This information is necessary to
establish whether the Yanmar product is still within the warranty period. Thus, Yanmar strongly recommends
you register your engine as soon as possible after purchase in order to facilitate any future warranty matters.
You are responsible for the transportation of the engine to and from the repair location as designated by
Yanmar.

YANMAR WARRANTIES
2-4 TNV DI Service Manual
Yanmar Limited Warranty
Yanmar Limited Warranty - Continued
To Locate an Authorized Yanmar Industrial Engine Dealer or Distributor:
You can locate your nearest authorized Yanmar industrial engine dealer or distributor by visiting the Yanmar
Corp., LTD. website at:
http://www.yanmar.co.jp (The Japanese language page will be displayed.) For English language “click” on
“English Page.”)
• “Click” on “Network” in the website heading to view the “Yanmar Worldwide Network.”
• Choose and “Click” on the desired product group.
• “Click” on the Icon closest to your region.
• “Click” on the desired country or Associate company to locate your nearest authorized Yanmar industrial
engine dealer or distributor.
• You may also contact Yanmar by clicking on “Inquiry” in the website heading and typing in your question
or comment.
What Yanmar Will Do:
Yanmar warrants to the original retail purchaser of a new Yanmar engine that Yanmar will make such repairs
and / or replacements at Yanmar’s option, of any part(s) of the Yanmar product covered by this Warranty
found to be defective in material and / or workmanship. Such repairs and / or replacements will be made at a
location designated by Yanmar at no cost to the purchaser for parts or labor.
What is Not Covered by this Warranty?
This Warranty does not cover parts affected by or damaged by any reason other than defective materials or
workmanship including, but not limited to, accident, misuse, abuse, “Acts of God,” neglect, improper
installation, improper maintenance, improper storage, the use of unsuitable attachments or parts, the use of
contaminated fuels, the use of fuels, oils, lubricants, or fluids other than those recommended in your Yanmar
Operation Manual, unauthorized alterations or modifications, ordinary wear and tear, and rust or corrosion.
This Warranty does not cover the cost of parts and / or labor required to perform normal / scheduled
maintenance on your Yanmar engine. This Warranty does not cover consumable parts such as, but not
limited to, filters, belts, hoses, fuel injector nozzles, lubricants and cleaning fluids. This Warranty does not
cover the cost of shipping the product to or from the Warranty repair facility.

YANMAR WARRANTIES
TNV DI Service Manual 2-5
Yanmar Limited Warranty
Yanmar Limited Warranty - Continued
Warranty Limitations:
The foregoing is Yanmar’s only obligation to you and your exclusive remedy for breach of warranty.
Failure to follow the requirements for submitting a claim under this Warranty may result in a waiver of all
claims for damages and other relief. In no event shall Yanmar or any authorized industrial engine dealer
or distributor be liable for incidental, special or consequential damages. Such consequential damages
may include, but not be limited to, loss of revenue, loan payments, cost of rental of substitute equipment,
insurance coverage, storage, lodging, transportation, fuel, mileage, and telephone costs. The limitations in
this Warranty apply regardless of whether your claims are based on breach of contract, tort (including
negligence and strict liability) or any other theory. Any action arising hereunder must be brought within one
(1) year after the cause of action accrues or it shall be barred. Some states and countries do not allow
certain limitations on warranties or for breach of warranties. This Warranty gives you specific legal rights,
and you may also have other rights which vary from state to state and country to country. Limitations
set forth in this paragraph shall not apply to the extent that they are prohibited by law.
Warranty Modifications:
Except as modified in writing and signed by the parties, this Warranty is and shall remain the complete and
exclusive agreement between the parties with respect to warranties, superseding all prior agreements,
written and oral, and all other communications between the parties relating to warranties. No person or
entity is authorized to give any other warranty or to assume any other obligation on behalf of
Yanmar, either orally or in writing.
Questions:
If you have any questions or concerns regarding this Warranty, please call or write to the nearest authorized
Yanmar industrial engine dealer or distributor or other authorized facility.
It is very important for the original retail purchaser to register the Yanmar product. Registration enables
Yanmar to provide the best support for your Yanmar product.
At the time of purchase, Yanmar highly recommends registering the retail purchaser’s information through
the website http://www.yanmar.co.jp as soon as possible.
If it is not possible to access the website, please contact the nearest authorized Yanmar industrial engine
dealer or distributor.
Retail Purchaser Registration

YANMAR WARRANTIES
2-6 TNV DI Service Manual
Emission System Warranty
EMISSION SYSTEM WARRANTY
YANMAR CO., LTD. LIMITED EMISSION CONTROL SYSTEM
WARRANTY - USA ONLY
Your Warranty Rights and Obligations:
California
The California Air Resources Board (CARB), the Environmental Protection Agency (EPA) and Yanmar Co.,
Ltd. hereafter referred to as Yanmar, are pleased to explain the emission control system warranty on your
industrial compression-ignition engine. In California, model year 2000 or later off-road compression-ignition
engines must be designed, built and equipped to meet the State’s stringent anti-smog standards. In all
states, 1998 and later non-road compression-ignition engines must be designed, built and equipped to meet
the United States EPA emissions standards. Yanmar warrants the emission control system on your engine
for the periods of time listed below provided there has been no abuse, neglect or improper maintenance of
your engine.
Your emission control system may include parts such as the fuel injection system and the air induction
system. Also included may be hoses, belts, connectors and other emission-related assemblies.
Where a warrantable condition exists, Yanmar will repair your non-road compression-ignition engine at no
charge to you including diagnosis, parts and labor.
Manufacturer’s Warranty Period:
The model year 1998 or later certified and labeled non-road compression-ignition engines are warranted for
the periods listed below. If any emission-related part on your engine is found to be defective during the
applicable warranty period, the part will be replaced by Yanmar.
Engine Type Warranty Period by Number of Years or Hours of Operation
Constant speed engines rated at or above
50 hp SAE (37 kW)
The warranty period is five (5) years or 3,000 hours of use, whichever occurs first.
In the absence of a device to measure the hours of use, the engine has a
warranty period of five (5) years.
Constant speed engines rated under 50 hp
SAE (37 kW) with rated speeds greater than
or equal to 3,000 rpm
The warranty period is two (2) years or 3,000 hours of use, whichever occurs first.
In the absence of a device to measure the hours of use, the engine has a
warranty period of two (2) years.
Engines rated at or above 26 hp SAE
(19 kW)
The warranty period is five (5) years or 3,000 hours of use, whichever occurs first.
In the absence of a device to measure the hours of use, the engine has a
warranty period of five (5) years.
Engines rated under 26 hp SAE (19 kW)
The warranty period is two (2) years or 3,000 hours of use, whichever occurs first.
In the absence of a device to measure the hours of use, the engine has a
warranty period of two (2) years.

YANMAR WARRANTIES
TNV DI Service Manual 2-7
Emission System Warranty
Limited Emission Control System Warranty - USA Only - Continued
Warranty Coverage:
This warranty is transferable to each subsequent purchaser for the duration of the warranty period. Repair or
replacement of any warranted part will be performed at an authorized Yanmar industrial engine dealer or
distributor.
Warranted parts not scheduled for replacement as required maintenance in the Operation Manual shall be
warranted for the warranty period. Warranted parts scheduled for replacement as required maintenance in
the operation manual are warranted for the period of time prior to the first scheduled replacement. Any part
repaired or replaced under warranty shall be warranted for the remaining warranty period.
During the warranty period, Yanmar is liable for damages to other engine components caused by the failure
of any warranted part during the warranty period.
Any replacement part which is functionally identical to the original equipment part in all respects may be
used in the maintenance or repair of your engine, and shall not reduce Yanmar’s warranty obligations. Add-
on or modified parts that are not exempted may not be used. The use of any non-exempted add-on or
modified parts shall be grounds for disallowing a warranty.
Warranted Parts:
This warranty covers engine components that are a part of the emission control system of the engine as
delivered by Yanmar to the original retail purchaser. Such components may include the following:
• Fuel Injection System
• Cold Start Enrichment System
• Intake Manifold
• Turbocharger Systems
• Exhaust Manifold
• Positive Crankcase Ventilation System
• Hoses, belts, connectors and assemblies associated with emission control systems
Since emissions-related parts may vary slightly between models, certain models may not contain all of these
parts and other models may contain the functional equivalents.

YANMAR WARRANTIES
2-8 TNV DI Service Manual
Emission System Warranty
Limited Emission Control System Warranty - USA Only - Continued
Exclusions:
Failures other than those arising from defects in material and / or workmanship are not covered by this
warranty. The warranty does not extend to the following: malfunctions caused by abuse, misuse, improper
adjustment, modification, alteration, tampering, disconnection, improper or inadequate maintenance or use
of non-recommended fuels and lubricating oils; accident-caused damage, and replacement of expendable
items made in connection with scheduled maintenance. Yanmar disclaims any responsibility for incidental or
consequential damages such as loss of time, inconvenience, loss of use of equipment / engine or
commercial loss.
Owner’s Warranty Responsibilities:
As the engine owner, you are responsible for the performance of the required maintenance listed in
your owner’s manual. Yanmar recommends that you retain all documentation, including receipts, covering
maintenance on your non-road compression-ignition engine, but Yanmar cannot deny warranty solely for the
lack of receipts, or for your failure to ensure the performance of all scheduled maintenance.
Yanmar may deny your warranty coverage of your non-road compression-ignition engine if a part has failed
due to abuse, neglect, improper maintenance or unapproved modifications.
Your engine is designed to operate on diesel fuel only. Use of any other fuel may result in your engine no
longer operating in compliance with applicable emissions requirements.
You are responsible for initiating the warranty process. You must present your engine to a Yanmar dealer as
soon as a problem exists. The warranty repairs should be completed by the dealer as expeditiously as
possible. If you have any questions regarding your warranty rights and responsibilities, or would like
information on the nearest Yanmar dealer or authorized service center, you should contact Yanmar America
Corporation at 1-800-872-2867.

TNV DI Service Manual 3-1
TNV DI Service Manual Section 3
SAFETY
Page
Safety Statements................................................................................. 3-3
Safety Precautions ................................................................................ 3-4

SAFETY
3-2 TNV DI Service Manual
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SAFETY
TNV DI Service Manual 3-3
Safety Statements
SAFETY STATEMENTS
Yanmar is concerned for your safety and your
machine’s condition. Safety statements are one of
the primary ways to call your attention to the
potential hazards associated with Yanmar TNV
engine operation. Follow the precautions listed
throughout the manual before operation, during
operation and during periodic maintenance
procedures for your safety, the safety of others and
to protect the performance of your engine. Keep the
labels from becoming dirty or torn and replace
them if they are lost or damaged. Also, if you need
to replace a part that has a label attached to it,
make sure you order the new part and label at the
same time.
A
This safety alert symbol appears
with most safety statements. It
means attention, become alert,
your safety is involved! Please read
and abide by the message that
follows the safety alert symbol.
ADANGER
Danger (the word “DANGER” is in white
letters with a red rectangle behind
it) - indicates an imminently hazardous
situation which, if not avoided, will
result in death or serious injury. Danger
is limited to the most extreme
situations.
0000001en
AWARNING
Warning (the word “WARNING” is in
black letters with an orange rectangle
behind it) – indicates a potentially
hazardous situation which, if not
avoided, could result in death or serious
injury.
0000001en
ACAUTION
Caution (the word “CAUTION” is in black
letters with a yellow rectangle behind it)
– indicates a potentially hazardous
situation which, if not avoided, may
result in minor or moderate injury.
0000001en
CAUTION
Caution without the safety alert symbol
indicates a potentially hazardous
situation that can cause damage to the
machine, personal property and / or the
environment or cause the machine to
operate improperly.
0000001en

SAFETY
3-4 TNV DI Service Manual
Safety Precautions
SAFETY PRECAUTIONS
ADANGER
SCALD HAZARD!
• NEVER remove the radiator cap if the
engine is hot. Steam and hot engine
coolant will spurt out and seriously
burn you. Allow the engine to cool
down before you attempt to remove
the radiator cap.
• Tighten the radiator cap securely after
you check the radiator. Steam can
spurt out during engine operation if
the cap is loose.
• ALWAYS check the level of the engine
coolant by observing the reserve tank.
• Failure to comply will result in death or
serious injury.
0000002en
ADANGER
EXPLOSION HAZARD!
• Keep the area around the battery well-
ventilated. While the engine is running
or the battery is charging, hydrogen
gas is produced which can be easily
ignited.
• Keep sparks, open flame and any other
form of ignition away while the engine
is running or battery is charging.
• Failure to comply will result in death or
serious injury.
0000003en
ADANGER
FIRE AND EXPLOSION HAZARD!
• Diesel fuel is flammable and explosive
under certain conditions.
• When you remove any fuel system
component to perform maintenance
(such as changing the fuel filter) place
an approved container under the
opening to catch the fuel.
• NEVER use a shop rag to catch the
fuel. Vapors from the rag are
flammable and explosive.
• Wipe up any spills immediately.
• Wear eye protection. The fuel system
is under pressure and fuel could spray
out when you remove any fuel system
component.
• Failure to comply will result in death or
serious injury.
0000009en
ADANGER
FIRE AND EXPLOSION HAZARD!
• Only use the key switch to start the
engine.
• NEVER jump-start the engine. Sparks
caused by shorting the battery to the
starter terminals may cause a fire or
explosion.
• Failure to comply will result in death or
serious injury.
0000004en

SAFETY
TNV DI Service Manual 3-5
Safety Precautions
ADANGER
FIRE AND EXPLOSION HAZARD!
• Diesel fuel is flammable and explosive
under certain conditions.
• If the unit has an electric fuel pump,
when you prime the fuel system, turn
the key switch to the ON position for
10 to 15 seconds to allow the electric
fuel pump to prime the system.
• If the unit has a mechanical fuel pump,
when you prime the fuel system,
operate the fuel priming lever of the
mechanical fuel pump several times
until the fuel filter cup is filled with
fuel.
• Failure to comply will result in death or
serious injury.
0000010en
ADANGER
FIRE AND EXPLOSION HAZARD!
• Diesel fuel is flammable and explosive
under certain conditions.
• Only fill the fuel tank with diesel fuel.
Filling the fuel tank with gasoline may
result in a fire and will damage the
engine.
• NEVER refuel with the engine running.
• Wipe up all spills immediately.
• Keep sparks, open flames or any other
form of ignition (match, cigarette,
static electric source) well away when
refueling.
• NEVER overfill the fuel tank.
• Fill the fuel tank. Store any containers
containing fuel in a well-ventilated
area, away from any combustibles or
sources of ignition.
• Failure to comply will result in death or
serious injury.
0000005en

SAFETY
3-6 TNV DI Service Manual
Safety Precautions
ADANGER
FIRE AND EXPLOSION HAZARD!
• Diesel fuel is extremely flammable and
explosive under certain conditions.
• Be sure to place the diesel fuel
container on the ground when
transferring the diesel fuel from the
pump to the container. Hold the hose
nozzle firmly against the side of the
container while filling it. This prevents
static electricity buildup which could
cause sparks and ignite fuel vapors.
• NEVER place diesel fuel or other
flammable material such as oil, hay or
dried grass close to the engine during
engine operation or shortly after
shutdown.
• Failure to comply will result in death or
serious injury.
0000014en
ADANGER
CRUSH HAZARD!
• When you need to transport an engine
for repair, have a helper assist you to
attach it to a hoist and load it on a
truck.
• NEVER stand under a hoisted engine.
If the hoist mechanism fails, the
engine will fall on you, causing death
or serious injury.
• Failure to comply will result in death or
serious injury.
0000008en
ADANGER
FIRE AND EXPLOSION HAZARD!
• Diesel fuel is flammable and explosive
under certain conditions.
• Before you operate the engine, check
for fuel leaks. Replace rubberized fuel
hoses every two years or every 2000
hours of engine operation, whichever
comes first, even if the engine has
been out of service. Rubberized fuel
lines tend to dry out and become
brittle after two years or 2000 hours of
engine operation, whichever comes
first.
• Failure to comply will result in death or
serious injury.
0000015en